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Adds Kotlin solution for problem #271#2556

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Merged
a93a merged 2 commits intoneetcode-gh:mainfromtechnophilist:main
Jun 30, 2023
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2 changes: 1 addition & 1 deletionREADME.md
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Expand Up@@ -55,7 +55,7 @@ If you would like to have collaborator permissions on the repo to merge your own
<sub>[0347 - Top K Frequent Elements](https://leetcode.com/problems/top-k-frequent-elements/)</sub> | <sub><div align='center'>[✔️](c%2F0347-top-k-frequent-elements.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0347-top-k-frequent-elements.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0347-top-k-frequent-elements.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0347-top-k-frequent-elements.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0347-top-k-frequent-elements.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0347-top-k-frequent-elements.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0347-top-k-frequent-elements.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0347-top-k-frequent-elements.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0347-top-k-frequent-elements.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0347-top-k-frequent-elements.rs)</div></sub> | <sub><div align='center'>[✔️](scala%2F0347-top-k-frequent-elements.scala)</div></sub> | <sub><div align='center'>[✔️](swift%2F0347-top-k-frequent-elements.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0347-top-k-frequent-elements.ts)</div></sub>
<sub>[0238 - Product of Array Except Self](https://leetcode.com/problems/product-of-array-except-self/)</sub> | <sub><div align='center'>[✔️](c%2F0238-product-of-array-except-self.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0238-product-of-array-except-self.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0238-product-of-array-except-self.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0238-product-of-array-except-self.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0238-product-of-array-except-self.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0238-product-of-array-except-self.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0238-product-of-array-except-self.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0238-product-of-array-except-self.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0238-product-of-array-except-self.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0238-product-of-array-except-self.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0238-product-of-array-except-self.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0238-product-of-array-except-self.ts)</div></sub>
<sub>[0036 - Valid Sudoku](https://leetcode.com/problems/valid-sudoku/)</sub> | <sub><div align='center'>[✔️](c%2F0036-valid-sudoku.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0036-valid-sudoku.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0036-valid-sudoku.cs)</div></sub> | <sub><div align='center'>[✔️](dart%2F0036-valid-sudoku.dart)</div></sub> | <sub><div align='center'>[✔️](go%2F0036-valid-sudoku.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0036-valid-sudoku.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0036-valid-sudoku.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0036-valid-sudoku.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0036-valid-sudoku.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0036-valid-sudoku.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0036-valid-sudoku.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](typescript%2F0036-valid-sudoku.ts)</div></sub>
<sub>[0271 - Encode and Decode Strings](https://leetcode.com/problems/encode-and-decode-strings/)</sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](cpp%2F0271-encode-and-decode-strings.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0271-encode-and-decode-strings.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0271-encode-and-decode-strings.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0271-encode-and-decode-strings.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0271-encode-and-decode-strings.js)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](python%2F0271-encode-and-decode-strings.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0271-encode-and-decode-strings.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0271-encode-and-decode-strings.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0271-encode-and-decode-strings.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0271-encode-and-decode-strings.ts)</div></sub>
<sub>[0271 - Encode and Decode Strings](https://leetcode.com/problems/encode-and-decode-strings/)</sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](cpp%2F0271-encode-and-decode-strings.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0271-encode-and-decode-strings.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0271-encode-and-decode-strings.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0271-encode-and-decode-strings.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0271-encode-and-decode-strings.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0271-encode-and-decode-strings.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0271-encode-and-decode-strings.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0271-encode-and-decode-strings.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0271-encode-and-decode-strings.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0271-encode-and-decode-strings.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0271-encode-and-decode-strings.ts)</div></sub>
<sub>[0128 - Longest Consecutive Sequence](https://leetcode.com/problems/longest-consecutive-sequence/)</sub> | <sub><div align='center'>[✔️](c%2F0128-longest-consecutive-sequence.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0128-longest-consecutive-sequence.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0128-longest-consecutive-sequence.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0128-longest-consecutive-sequence.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0128-longest-consecutive-sequence.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0128-longest-consecutive-sequence.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0128-longest-consecutive-sequence.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0128-longest-consecutive-sequence.py)</div></sub> | <sub><div align='center'>[✔️](ruby%2F0128-longest-consecutive-sequence.rb)</div></sub> | <sub><div align='center'>[✔️](rust%2F0128-longest-consecutive-sequence.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0128-longest-consecutive-sequence.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0128-longest-consecutive-sequence.ts)</div></sub>
<sub>[0075 - Sort Colors](https://leetcode.com/problems/sort-colors/)</sub> | <sub><div align='center'>[✔️](c%2F0075-sort-colors.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0075-Sort-colors.cpp)</div></sub> | <sub><div align='center'>[✔️](csharp%2F0075-sort-colors.cs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0075-sort-colors.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0075-sort-colors.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0075-sort-colors.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0075-sort-colors.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0075-sort-colors.py)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](rust%2F0075-sort-colors.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0075-sort-colors.swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0075-sort-colors.ts)</div></sub>
<sub>[0535 - Encode and Decode TinyURL](https://leetcode.com/problems/encode-and-decode-tinyurl/)</sub> | <sub><div align='center'>[✔️](c%2F0535-encode-and-decode-tinyurl.c)</div></sub> | <sub><div align='center'>[✔️](cpp%2F0535-encode-and-decode-tinyurl.cpp)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](go%2F0535-encode-and-decode-tinyurl.go)</div></sub> | <sub><div align='center'>[✔️](java%2F0535-encode-and-decode-tinyurl.java)</div></sub> | <sub><div align='center'>[✔️](javascript%2F0535-encode-and-decode-tinyurl.js)</div></sub> | <sub><div align='center'>[✔️](kotlin%2F0535-encode-and-decode-tinyurl.kt)</div></sub> | <sub><div align='center'>[✔️](python%2F0535-encode-and-decode-tinyurl.py)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](rust%2F0535-encode-and-decode-tinyURL.rs)</div></sub> | <sub><div align='center'>❌</div></sub> | <sub><div align='center'>[✔️](swift%2F0535-Encode-and-Decode-TinyURL.Swift)</div></sub> | <sub><div align='center'>[✔️](typescript%2F0535-encode-and-decode-tinyurl.ts)</div></sub>
Expand Down
43 changes: 43 additions & 0 deletionskotlin/0271-encode-and-decode-strings.kt
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@@ -0,0 +1,43 @@
package kotlin

class Codec {
// Encodes a list of strings to a single string.
fun encode(strs: List<String>): String {
val stringBuilder = StringBuilder()
for (string in strs) {
for (char in string) {
stringBuilder.append(char.toInt()) // char.code in newer version's of Kotlin
stringBuilder.append(CHAR_DELIMITER)
}
stringBuilder.append(STRING_DELIMITER)
}
return stringBuilder.toString()
}

// Decodes a single string to a list of strings.
fun decode(s: String): List<String> {
val stringBuilder = StringBuilder()
val resultantList = mutableListOf<String>()
var i = 0
while (i in s.indices) {
while (s[i] != STRING_DELIMITER) {
var charIntegerValue = ""
while (s[i] != CHAR_DELIMITER) {
charIntegerValue += s[i]
i++
}
stringBuilder.append(charIntegerValue.toInt().toChar())
i++
}
resultantList.add(stringBuilder.toString())
stringBuilder.clear()
i++
}
return resultantList
}

companion object {
private const val CHAR_DELIMITER = '|'
private const val STRING_DELIMITER = '/'
}
}
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